Two Oak Ridge engineers proposed a new nuclear device to power future NASA missions to Neptune and its moon Triton.

Add Yahoo as a preferred source to see more of our stories on Google. Voyager 1, shown in this illustration, has operated for decades thanks to a radioisotope power system. NASA via AP Powering ...

In 1977, two spacecraft, Voyager 1 and Voyager 2, launched toward the unknown. Nearly fifty years later, they remain alive at the edge of interstellar space, still whispering faint signals back to ...

Add Yahoo as a preferred source to see more of our stories on Google. A landmark test of beaming solar power to Earth from a satellite has concluded successfully after a year-long mission. The Space ...

Cold, dark crater floors near the Moon’s south pole may hold one of space exploration’s most useful prizes: water ice. Yet those same places sit in permanent darkness, with temperatures dropping below ...

WASHINGTON, Dec 17 (Reuters) - A September power outage at a California facility of SpaceX, the space venture of billionaire entrepreneur Elon Musk, caused a loss of ground control for at least an ...